Initial commit.

LICENSE

@@ -0,0 +1,7 @@
+Copyright (c) 2021,2022 Alexander "Arav" Andreev <me@arav.top>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice, this permission notice and the word "NIGGER" shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Makefile

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+TARGET=dwelling-upload
+
+SYSCTL=${shell which systemctl}
+SYSDDIR_=${shell pkg-config systemd --variable=systemdsystemunitdir}
+SYSDDIR=${SYSDDIR_:/%=%}
+DESTDIR=/
+
+LDFLAGS=-ldflags "-s -w"
+
+SOURCES := ${wildcard *.go}
+
+all: ${TARGET}
+
+.PHONY: ${TARGET}
+
+${TARGET}:
+	go build -o bin/$@ ${LDFLAGS} cmd/$@/main.go
+	go build -o bin/$@-clear ${LDFLAGS} cmd/$@-clear/main.go
+
+run:
+	bin/${TARGET} -config configs/config.yaml
+
+install:
+	install -Dm 0755 ${TARGET} ${DESTDIR}usr/bin/${TARGET}
+	install -Dm 0755 ${TARGET}-clean ${DESTDIR}usr/bin/${TARGET}-clean
+	install -Dm 0644 LICENSE ${DESTDIR}usr/share/licenses/${TARGET}/LICENSE
+
+	install -Dm 0644 init/systemd/${TARGET}.service ${DESTDIR}${SYSDDIR}/${TARGET}.service
+	install -Dm 0644 init/systemd/${TARGET}-clear.timer ${DESTDIR}${SYSDDIR}/${TARGET}-clear.timer
+	install -Dm 0644 init/systemd/${TARGET}-clear.service ${DESTDIR}${SYSDDIR}/${TARGET}-clear.service
+
+uninstall:
+	rm ${DESTDIR}usr/bin/${TARGET}
+	rm ${DESTDIR}usr/bin/${TARGET}-clear
+	rm ${DESTDIR}usr/share/licenses/${TARGET}/LICENSE
+
+	${SYSCTL} stop ${TARGET}.service
+	${SYSCTL} stop ${TARGET}-clear.timer
+	${SYSCTL} disable ${TARGET}.service
+	${SYSCTL} disable ${TARGET}.timer
+	rm ${DESTDIR}${SYSDDIR}/${TARGET}.service
+	rm ${DESTDIR}${SYSDDIR}/${TARGET}-clear.timer
+	rm ${DESTDIR}${SYSDDIR}/${TARGET}-clear.service
+
+clean:
+	go clean

cmd/dwelling-upload-clear/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"dwelling-upload/internal/configuration"
+	"flag"
+	"io/ioutil"
+	"log"
+	"os"
+	"path"
+	"time"
+)
+
+var configPath string = *flag.String("conf", "config.yaml", "path to configuration file")
+
+func main() {
+	config, err := configuration.LoadConfiguration(configPath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	_ = config
+
+	uploads_dir, err := ioutil.ReadDir(config.Uploads.Directory)
+	if err != nil {
+		log.Fatalf("failed to open directory %s: %s\n", config.Uploads.Directory, err)
+	}
+
+	var deleted_count int64 = 0
+	var deteted_size int64 = 0
+
+	for _, entry := range uploads_dir {
+		if time.Duration(entry.ModTime().UTC().Sub(time.Now().UTC()).Hours()) >= 24*time.Hour {
+			if err := os.Remove(path.Join(config.Uploads.Directory, entry.Name())); err != nil {
+				log.Fatalln("failed to remove file ", entry.Name(), ": ", err)
+			}
+			deteted_size += entry.Size()
+			deleted_count++
+		}
+	}
+
+	log.Println(deleted_count, " file(s) in total of ", deteted_size/1024/1024, " MiB was removed during this run.")
+}

cmd/dwelling-upload/main.go

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+package main
+
+import (
+	"dwelling-upload/internal/configuration"
+	"dwelling-upload/pkg/server"
+	"flag"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+var configPath string = *flag.String("conf", "config.yaml", "path to configuration file")
+
+func main() {
+	config, err := configuration.LoadConfiguration(configPath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	srv := server.NewHttpServer()
+
+	if err := srv.Start(config.SplitNetworkAddress()); err != nil {
+		log.Fatalln(err)
+	}
+
+	doneSignal := make(chan os.Signal, 1)
+	signal.Notify(doneSignal, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+
+	<-doneSignal
+
+	if err := srv.Stop(); err != nil {
+		log.Fatalln(err)
+	}
+}

configs/config.yaml

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+listen_on: "tcp :29101"
+uploads:
+  directory: "/srv/uploads"
+  limits:
+    file_size: "128M"
+    keep_for_hours: 48
+    storage: "200G"

go.mod

@@ -0,0 +1,9 @@
+module dwelling-upload
+
+go 1.17
+
+require (
+	github.com/julienschmidt/httprouter v1.3.0
+	github.com/pkg/errors v0.9.1
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
+)

init/systemd/dwelling-upload-clear.service

@@ -0,0 +1,9 @@
+[Unit]
+Description=dwelling-upload-clear
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/dwelling-upload-clear -config /etc/dwelling-upload/config.yaml
+
+[Install]
+WantedBy=multi-user.target

init/systemd/dwelling-upload-clear.timer

@@ -0,0 +1,10 @@
+[Unit]
+Description=dwelling-upload-clear
+
+[Timer]
+OnCalendar=hourly
+AccuracySec=1h
+Persistent=true
+
+[Install]
+WantedBy=timers.target

init/systemd/dwelling-upload.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=dwelling-upload
+After=network.target
+
+[Service]
+Type=simple
+Restart=on-failure
+ExecStart=/usr/bin/dwelling-upload -config /etc/dwelling-upload/config.yaml
+
+[Install]
+WantedBy=multi-user.target

internal/configuration/configuration.go

@@ -0,0 +1,43 @@
+package configuration
+
+import (
+	"os"
+	"strings"
+
+	"github.com/pkg/errors"
+	"gopkg.in/yaml.v3"
+)
+
+// Configuration holds a list of process names to be tracked and a listen address.
+type Configuration struct {
+	ListenOn string `yaml:"listen_on"`
+	Uploads  struct {
+		Directory string `yaml:"directory"`
+		Limits    struct {
+			FileSize     string `yaml:"file_size"`
+			KeepForHours int    `yaml:"keep_for_hours"`
+			Storage      string `yaml:"storage"`
+		} `yaml:"limits"`
+	} `yaml:"uploads"`
+}
+
+func LoadConfiguration(path string) (*Configuration, error) {
+	config_file, err := os.Open(path)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to open configuration file")
+	}
+
+	config := &Configuration{}
+
+	if err := yaml.NewDecoder(config_file).Decode(config); err != nil {
+		return nil, errors.Wrap(err, "failed to decode configuration file")
+	}
+
+	return config, nil
+}
+
+func (c *Configuration) SplitNetworkAddress() (n string, a string) {
+	s := strings.Split(c.ListenOn, " ")
+	n, a = s[0], s[1]
+	return n, a
+}

pkg/server/http.go

@@ -0,0 +1,97 @@
+package server
+
+import (
+	"context"
+	"crypto/subtle"
+	"encoding/json"
+	"log"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/julienschmidt/httprouter"
+)
+
+type HttpServer struct {
+	server *http.Server
+	router *httprouter.Router
+}
+
+func NewHttpServer() *HttpServer {
+	r := httprouter.New()
+	return &HttpServer{
+		server: &http.Server{
+			ReadTimeout:  3 * time.Second,
+			WriteTimeout: 3 * time.Second,
+			Handler:      r,
+		},
+		router: r,
+	}
+}
+
+func (s *HttpServer) GET(path string, handler http.HandlerFunc) {
+	s.router.Handler(http.MethodGet, path, handler)
+}
+
+func (s *HttpServer) POST(path string, handler http.HandlerFunc) {
+	s.router.Handler(http.MethodPost, path, handler)
+}
+
+func (s *HttpServer) PATCH(path string, handler http.HandlerFunc) {
+	s.router.Handler(http.MethodPatch, path, handler)
+}
+
+func (s *HttpServer) PUT(path string, handler http.HandlerFunc) {
+	s.router.Handler(http.MethodPut, path, handler)
+}
+
+func (s *HttpServer) DELETE(path string, handler http.HandlerFunc) {
+	s.router.Handler(http.MethodDelete, path, handler)
+}
+
+// GetURLParams wrapper around underlying router for getting URL parameters.
+func GetURLParams(r *http.Request) httprouter.Params {
+	return httprouter.ParamsFromContext(r.Context())
+}
+
+func (s *HttpServer) Start(network, address string) error {
+	listener, err := net.Listen(network, address)
+	if err != nil {
+		return err
+	}
+
+	go func() {
+		if err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {
+			log.Fatalln(err)
+		}
+	}()
+
+	return nil
+}
+
+func (s *HttpServer) Stop() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	if err := s.server.Shutdown(ctx); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// AuthWithToken middleware that authenticates user by token (that is effectively just a password)
+// supplied in an 'Authentication-Token' HTTP header.
+func AuthWithToken(handler http.HandlerFunc, token string) http.HandlerFunc {
+	return func(rw http.ResponseWriter, r *http.Request) {
+		if subtle.ConstantTimeCompare([]byte(r.Header.Get("Authentication-Token")), []byte(token)) == 1 {
+			handler(rw, r)
+		} else {
+			rw.WriteHeader(http.StatusUnauthorized)
+			rw.Header().Add("Content-Type", "application/json")
+			response := make(map[string]string)
+			response["message"] = "Unauthorized"
+			json.NewEncoder(rw).Encode(response)
+		}
+	}
+}